The influence of merger and convection on an anticyclonic eddy trapped in a bowl
International audience We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated...
Published in: | Ocean Modelling |
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Online Access: | https://insu.hal.science/insu-03683248 https://insu.hal.science/insu-03683248v2/document https://insu.hal.science/insu-03683248v2/file/91042.pdf https://doi.org/10.1016/j.ocemod.2021.101874 |
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ftccsdartic:oai:HAL:insu-03683248v2 2024-02-11T10:05:40+01:00 The influence of merger and convection on an anticyclonic eddy trapped in a bowl de Marez, Charly Le Corre, Mathieu Gula, Jonathan Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) ANR-19-CE01-0002,DEEPER,Impacts de la turbulence de sous-mésoéchelle profonde sur la circulation océanique(2019) 2021 https://insu.hal.science/insu-03683248 https://insu.hal.science/insu-03683248v2/document https://insu.hal.science/insu-03683248v2/file/91042.pdf https://doi.org/10.1016/j.ocemod.2021.101874 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ocemod.2021.101874 insu-03683248 https://insu.hal.science/insu-03683248 https://insu.hal.science/insu-03683248v2/document https://insu.hal.science/insu-03683248v2/file/91042.pdf BIBCODE: 2021OcMod.16701874D doi:10.1016/j.ocemod.2021.101874 PII: S1463-5003(21)00127-X http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 1463-5003 Ocean Modelling https://insu.hal.science/insu-03683248 Ocean Modelling, 2021, 167, ⟨10.1016/j.ocemod.2021.101874⟩ Mesoscale Vortex Merger Convection [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1016/j.ocemod.2021.101874 2024-01-13T23:42:14Z International audience We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated at depth allows the eddy to grow in size, and intensify at depth. Wintertime convection is also shown to directly intensify the eddy by deepening isopycnals. Also, convection indirectly affects the shape of the eddy. It enhances the number of merger (1) at the surface, with small vortices generated in the convectively-deepened surface mixed-layer, and (2) at depth, because the vertical distance between the main eddy's core and small companion vortices is reduced, thus increasing the merging efficiency. These processes altogether contribute to the maintaining of the eddy. On the other hand, the bottom drag is the main process contributing to the decay of the eddy. Our study thus shows that the sustaining for several years of such eddies trapped in a bowl is mainly due to the balance between merger and bottom drag. Article in Journal/Newspaper Lofoten Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Lofoten Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Ocean Modelling 167 101874 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Mesoscale Vortex Merger Convection [SDU]Sciences of the Universe [physics] |
spellingShingle |
Mesoscale Vortex Merger Convection [SDU]Sciences of the Universe [physics] de Marez, Charly Le Corre, Mathieu Gula, Jonathan The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
topic_facet |
Mesoscale Vortex Merger Convection [SDU]Sciences of the Universe [physics] |
description |
International audience We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated at depth allows the eddy to grow in size, and intensify at depth. Wintertime convection is also shown to directly intensify the eddy by deepening isopycnals. Also, convection indirectly affects the shape of the eddy. It enhances the number of merger (1) at the surface, with small vortices generated in the convectively-deepened surface mixed-layer, and (2) at depth, because the vertical distance between the main eddy's core and small companion vortices is reduced, thus increasing the merging efficiency. These processes altogether contribute to the maintaining of the eddy. On the other hand, the bottom drag is the main process contributing to the decay of the eddy. Our study thus shows that the sustaining for several years of such eddies trapped in a bowl is mainly due to the balance between merger and bottom drag. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) ANR-19-CE01-0002,DEEPER,Impacts de la turbulence de sous-mésoéchelle profonde sur la circulation océanique(2019) |
format |
Article in Journal/Newspaper |
author |
de Marez, Charly Le Corre, Mathieu Gula, Jonathan |
author_facet |
de Marez, Charly Le Corre, Mathieu Gula, Jonathan |
author_sort |
de Marez, Charly |
title |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_short |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_full |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_fullStr |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_full_unstemmed |
The influence of merger and convection on an anticyclonic eddy trapped in a bowl |
title_sort |
influence of merger and convection on an anticyclonic eddy trapped in a bowl |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03683248 https://insu.hal.science/insu-03683248v2/document https://insu.hal.science/insu-03683248v2/file/91042.pdf https://doi.org/10.1016/j.ocemod.2021.101874 |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Lofoten Rockall Trough |
geographic_facet |
Lofoten Rockall Trough |
genre |
Lofoten |
genre_facet |
Lofoten |
op_source |
ISSN: 1463-5003 Ocean Modelling https://insu.hal.science/insu-03683248 Ocean Modelling, 2021, 167, ⟨10.1016/j.ocemod.2021.101874⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ocemod.2021.101874 insu-03683248 https://insu.hal.science/insu-03683248 https://insu.hal.science/insu-03683248v2/document https://insu.hal.science/insu-03683248v2/file/91042.pdf BIBCODE: 2021OcMod.16701874D doi:10.1016/j.ocemod.2021.101874 PII: S1463-5003(21)00127-X |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.ocemod.2021.101874 |
container_title |
Ocean Modelling |
container_volume |
167 |
container_start_page |
101874 |
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1790602784968540160 |